<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card>
      <!-- 添加角色列表区域 -->
      <el-row>
        <el-col>
          <el-button type="primary">添加角色</el-button>
        </el-col>
      </el-row>

      <!-- 角色列表区域 -->
      <el-table :data="rolesList" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']" v-for="(item1, i1) in scope.row.children" :key="item1.id">
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag @close="deleteRightById(scope.row, item1.id)" closable>{{ item1.authName }}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级和三级权限 -->
              <el-col :span="19">
                <!-- 通过for循环渲染二级权限 -->
                <el-row :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']" v-for="(item2, i2) in item1.children" :key="item2.id">
                  <el-col :span="6">
                    <el-tag @close="deleteRightById(scope.row, item2.id)" closable type="success">{{ item2.authName }}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag @close="deleteRightById(scope.row, item3.id)" closable type="warning" v-for="item3 in item2.children" :key="item3.id">
                      {{ item3.authName }}
                    </el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作">
          <template slot-scope="scope">
            <el-button type="primary" icon="el-icon-edit" size="mini">编辑</el-button>

            <el-button type="danger" icon="el-icon-delete" size="mini">删除</el-button>

            <el-button type="warning" icon="el-icon-setting" size="mini" @click="showSetRight(scope.row)">分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <!-- 分配权限对话框 -->
    <el-dialog @close="setRightClosed()" title="分配权限" :visible.sync="setRightDialogVisible" width="50%">
      <!-- 树形空间 -->
      <el-tree ref="treeRef" show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys" :data="rightsList" :props="treeProps"></el-tree>

      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editRights()">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      rolesList: [],
      setRightDialogVisible: false,
      rightsList: [],
      // 树形空间的属性绑定
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      // 默认选中的节点ID值
      defKeys: [],
      // 即将分配角色的ID
      roleId: []
    }
  },
  created() {
    this.getALLroles()
  },
  methods: {
    async getALLroles() {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        return this.$message.error(`${res.meta.msg}`)
      }
      this.rolesList = res.data
    },
    // 根据ID删除权限
    async deleteRightById(role, rightId) {
      // 弹框提示用户是否删除
      const result = await this.$confirm('此操作将永久删除该用户, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch((err) => err)

      if (result !== 'confirm') {
        return this.$message('取消操作')
      }
      const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
      if (res.meta.status !== 200) {
        return this.$message.error(`${res.meta.msg}`)
      }

      role.children = res.data
      this.$message.success(`${res.meta.msg}`)
    },
    // 展示对话框
    async showSetRight(role) {
      this.roleId = role.id
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) {
        return this.$message.error(`${res.meta.msg}`)
      }
      // 保存获取到的权限数据
      this.rightsList = res.data
      // 递归获取三级节点ID
      this.getAllKeys(role, this.defKeys)
      this.setRightDialogVisible = true
    },
    // 通过递归获得所有三级权限信息
    getAllKeys(node, arr) {
      if (!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach((element) => {
        this.getAllKeys(element, arr)
      })
    },
    // 监听对话框窗口关闭，清空权限ID数组
    setRightClosed() {
      this.defKeys = []
    },
    // 分配权限函数
    async editRights() {
      const keys = [...this.$refs.treeRef.getCheckedKeys(), ...this.$refs.treeRef.getHalfCheckedKeys()]
      const idStr = keys.join(',')
      const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
      if (res.meta.status !== 200) {
        return this.$message.error(`${res.meta.msg}`)
      }
      this.$message.success(`${res.meta.msg}`)
      this.getALLroles()
      this.setRightDialogVisible = false
    }
  }
}
</script>

<style lang="less" scoped>
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>
